Juan Sahuquillo, MD, PhD, is a neurosurgeon, Scientific Advisor, and Independent Researcher. He pursued his clinical and academic career at Vall d’Hebron University Hospital in Barcelona from 1985 until his retirement from clinical practice in June 2026, serving as Head of the Department of Neurosurgery from 2009 to 2021. He was also Professor of Surgery at the Autonomous University of Barcelona. His principal clinical and research interests include traumatic brain injury, Chiari malformation and other disorders of the craniocervical junction, skull base surgery, and disorders of cerebrospinal fluid (CSF) dynamics, with particular expertise in CSF hydrodynamics, hydrocephalus, and idiopathic normal pressure hydrocephalus (iNPH). Following his retirement from clinical practice, he continues his scientific activities as a Scientific Advisor and Independent Researcher, with active involvement in biomedical research, evidence-based medicine, scientific publishing, and editorial work. He serves on the Editorial Boards of the Journal of Clinical Medicine and Biomedicines and is a member of the Editorial Board of the Cochrane Acute and Emergency Care Thematic Group.